What is a Computer?
Computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. It also operates under the control of instructions stored in its own memory.
Components of Computer
A computer contains many electric, electronic, and mechanical components known as hardware
Computer hardware is the physical parts or components of a computer, such as the monitor, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory (RAM), motherboard, and so on, all of which are tangible physical objects.
- Input devices
- Output devices
- System unit
- Storage devices
- Communication devices
Advantages of using Computer
- Speed
- Reliability
- Consistency
- Storage
- Communications
Disadvantages of using Computer
- Health risk
- Violation of Privacy
- Public Safety
- Impact on Labour Force
- impact on Enviroment
Green Computing
Green computing is the environmentally responsible and eco-friendly use of computers and their resources. In broader terms, it is also defined as the study of designing, manufacturing/engineering, using and disposing of computing devices in a way that reduces their environmental impact.
NETWORKS & INTERNET
A computer network or data network is a telecommunications network which allows computers to exchange data. In computer networks, networked computing devices exchange data with each other using a data link. The connections between nodes are established using either cable media or wireless media.
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Example of networks
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The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link billions of devices worldwide.
Uses of Internet
- Communication
- Research and Access Infomation
- Shop
- Bank and Invest
- Online Trading
- Entertainment
- Web Application
COMPUTER SOFTWARE
Software is a generic term for organized collections of computer data and instructions, often broken into two major categories: system software that provides the basic non-task-specific functions of the computer, and application software which is used by users to accomplish specific tasks.
CATEGORIES of COMPUTERS
- Personal computers
- Mobile Computers and Devices
- Game Consoles
- Servers
- Mainframes
- Supercomputers
- Embedded Computers
Elements of Information System
- Hardware
- Software
- Data
- People
- Procedures
Examples of Computer Usage
- Home User
- Small Office/Home Office User
- Mobile User
- Power User
- Enterprise User
Computer Application in Society
- Education
- Finance
- Government
- Health Care
- Science
- Publishing
- Travel
- Manufacture
